51單片機程序——按鍵控制數碼管程序0-999遞增

#define DataPort P0 //定義數據端口 程序中遇到DataPort 則用P0 替換

#define CtrlPort P1 //定義控制端口

#define uint unsigned int

unsigned char code DuanMa[10]={0xc0,0xf9,0xa4,0xb0, 0x99,0x92,0x82,0xf8,0x80,0x90};// 顯示段碼值0~9

unsigned char code WeiMa[]={0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80};//分別對應相應的數碼管點(diǎn)亮,即位碼

unsigned char TempData[8]; //存儲顯示值的全局變量

sbit key=P3^1; //對應于s18按鍵

void Delay(unsigned int t); //函數聲明

void Display(unsigned char FirstBit,unsigned char Num);

void delay1(uint z)

{

uint x,y;

for(x=z;x>0;x--)

for(y=110;y>0;y--);

}

void main (void)

{

uint a=0;

// DuanMa=0xff;

while(1)

{

if(key==0)

{

delay1(5);

if(key==0)

{

a++;

while(!key);

delay1(5);

while(!key);

}

}

TempData[0]=DuanMa[a]; //分解顯示信息，

TempData[1]=DuanMa[a0/10];

TempData[2]=DuanMa[a/100];

Display(0,3);

}

}

void Delay(unsigned int t)

{

while(--t);

}

void Display(unsigned char FirstBit,unsigned char Num)

{

unsigned char i;

for(i=0;i

{

DataPort=0; //清空數據，防止有交替重影

CtrlPort=WeiMa[i+FirstBit]; //取位碼

DataPort=TempData[i]; //取顯示數據，段碼

Delay(100); // 掃描間隙延時(shí)，時(shí)間太長(cháng)會(huì )閃爍，

//太短會(huì )造成重影

}

}